package com.code.springboot.filter;

import com.alibaba.fastjson.JSON;
import com.code.springboot.common.BaseContext;
import com.code.springboot.common.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.AntPathMatcher;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/*检查用户是否登录*/
@WebFilter(filterName = "loginCheckFilter",urlPatterns = "/*")
@Slf4j


public class LoginCheckFilter implements Filter {
    //路径匹配器
    public static final AntPathMatcher PATH_MATCHER = new AntPathMatcher();

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;



        //获取本次请求url
        String requestURL = request.getRequestURI();
        log.info("拦截到请求：{}",request.getRequestURI());

        //定义不需要处理的请求路径
        String[] urls = new String[]{
                "/employee/login",
                "/employee/logout",
                "/backend/**",
                "/front/**",
                "/common/**",
                "/user/login",
                "/user/sendMsg",
        };


        //判断请求是否需要处理
        boolean check = check(urls,requestURL);

        //不需处理则放行
        if(check){
            log.info("本次请求：{}不需处理",requestURL);
            filterChain.doFilter(request,response);
            return;
        }

        //判断管理员登录状态
        if(request.getSession().getAttribute("employee") != null){
            log.info("用户已登录，用户id；{}",request.getSession().getAttribute("employee"));


            Long empId = (Long) request.getSession().getAttribute("employee");
            BaseContext.setCurrentId(empId);



            filterChain.doFilter(request,response);
            return;
        }

        //判断用户登录状态
        //判断登录状态
        if(request.getSession().getAttribute("user") != null){
            log.info("用户已登录，用户id；{}",request.getSession().getAttribute("user"));


            Long empId = (Long) request.getSession().getAttribute("user");
            BaseContext.setCurrentId(empId);



            filterChain.doFilter(request,response);
            return;
        }

        log.info("用户未登录");
        //未登录则返回未登录结果，通过输出流向客户端响应数据
        response.getWriter().write(JSON.toJSONString(R.error("NOTLOGIN")));
        return;



       /* log.info("拦截到请求：{}",request.getRequestURI());
        filterChain.doFilter(request,response);*/
    }

    public boolean check(String[] urls,String requestURL){
        for(String url : urls){
            boolean match = PATH_MATCHER.match(url, requestURL);
            if(match) {return  true;}
        }
        return false;
    }
}
